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authorYehuda Sadeh <yehuda@hq.newdream.net>2009-12-19 00:51:57 +0300
committerSage Weil <sage@newdream.net>2009-12-22 03:39:56 +0300
commit2baba25019ec564cd247af74013873d69a0b8190 (patch)
treec0995b8087cff771dd51aaf1194fd238f4490f01 /fs/ceph/debugfs.c
parentdbd646a851713bec5bfff40ecf624b2e78518fe5 (diff)
downloadlinux-2baba25019ec564cd247af74013873d69a0b8190.tar.xz
ceph: writeback congestion control
Set bdi congestion bit when amount of write data in flight exceeds adjustable threshold. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
Diffstat (limited to 'fs/ceph/debugfs.c')
-rw-r--r--fs/ceph/debugfs.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/fs/ceph/debugfs.c b/fs/ceph/debugfs.c
index 441484ab7e94..22d3b47fb1be 100644
--- a/fs/ceph/debugfs.c
+++ b/fs/ceph/debugfs.c
@@ -320,6 +320,30 @@ DEFINE_SHOW_FUNC(osdc_show)
DEFINE_SHOW_FUNC(dentry_lru_show)
DEFINE_SHOW_FUNC(caps_show)
+static int congestion_kb_set(void *data, u64 val)
+{
+ struct ceph_client *client = (struct ceph_client *)data;
+
+ if (client)
+ client->mount_args->congestion_kb = (int)val;
+
+ return 0;
+}
+
+static int congestion_kb_get(void *data, u64 *val)
+{
+ struct ceph_client *client = (struct ceph_client *)data;
+
+ if (client)
+ *val = (u64)client->mount_args->congestion_kb;
+
+ return 0;
+}
+
+
+DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
+ congestion_kb_set, "%llu\n");
+
int __init ceph_debugfs_init(void)
{
ceph_debugfs_dir = debugfs_create_dir("ceph", NULL);
@@ -409,6 +433,14 @@ int ceph_debugfs_client_init(struct ceph_client *client)
if (!client->debugfs_caps)
goto out;
+ client->debugfs_congestion_kb = debugfs_create_file("writeback_congestion_kb",
+ 0600,
+ client->debugfs_dir,
+ client,
+ &congestion_kb_fops);
+ if (!client->debugfs_congestion_kb)
+ goto out;
+
sprintf(name, "../../bdi/%s", dev_name(client->sb->s_bdi->dev));
client->debugfs_bdi = debugfs_create_symlink("bdi", client->debugfs_dir,
name);
@@ -431,6 +463,7 @@ void ceph_debugfs_client_cleanup(struct ceph_client *client)
debugfs_remove(client->osdc.debugfs_file);
debugfs_remove(client->mdsc.debugfs_file);
debugfs_remove(client->monc.debugfs_file);
+ debugfs_remove(client->debugfs_congestion_kb);
debugfs_remove(client->debugfs_dir);
}